25115397907 has 2 divisors, whose sum is σ = 25115397908. Its totient is φ = 25115397906.

The previous prime is 25115397877. The next prime is 25115397913. The reversal of 25115397907 is 70979351152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25115397907 is a prime.

It is not a weakly prime, because it can be changed into another prime (25115397107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557698953 + 12557698954.

It is an arithmetic number, because the mean of its divisors is an integer number (12557698954).

Almost surely, 2^25115397907 is an apocalyptic number.

25115397907 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115397907 is an equidigital number, since it uses as much as digits as its factorization.

25115397907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 595350, while the sum is 49.

The spelling of 25115397907 in words is "twenty-five billion, one hundred fifteen million, three hundred ninety-seven thousand, nine hundred seven".